//
// procfs.h
//
// Kernel Information Filesystem
//
// Copyright (C) 2002 Michael Ringgaard. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 
// 1. Redistributions of source code must retain the above copyright 
//    notice, this list of conditions and the following disclaimer.  
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.  
// 3. Neither the name of the project nor the names of its contributors
//    may be used to endorse or promote products derived from this software
//    without specific prior written permission. 
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
// SUCH DAMAGE.
// 

#ifndef PROCFS_H
#define PROCFS_H

#define PROC_BLKSIZE    4088
#define PROC_ROOT_INODE 0

struct proc_file;

typedef int (*proc_t)(struct proc_file *f, void *arg);

struct proc_inode {
  char *name;
  int namelen;
  ino_t ino;
  proc_t proc;
  void *arg;
  size_t size;
  struct proc_inode *next;
};

struct proc_blk {
  struct proc_blk *next;
  int size;
  char data[PROC_BLKSIZE];
};

struct proc_file {
  struct proc_inode *inode;
  size_t size;
  struct proc_blk *blkhead;
  struct proc_blk *blktail;
};

void init_procfs();

krnlapi int register_proc_inode(char *name, proc_t proc, void *arg);
krnlapi int proc_write(struct proc_file *pf, void *buffer, size_t size);
krnlapi int pprintf(struct proc_file *pf, const char *fmt, ...);

#endif
